Excel to CSV Converter
Convert Excel spreadsheets (.xlsx) to CSV format. Free, private, no file stored.
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Excel data in universal format
CSV is the universal format for data exchange. Convert your Excel spreadsheet's active sheet to a clean CSV file that works with any data tool, database, or programming language.
- Universal compatibility - CSV works everywhere
- Data import ready - ideal for databases, Python, R, and SQL
- Clean output - UTF-8 encoded with BOM for Excel compatibility
About Converting XLSX to CSV
XLSX is the modern Microsoft Excel format — a ZIP of XML that stores multiple sheets, formulas, charts and formatting. It is the standard for business spreadsheets. When you need to move away from XLSX, the usual reason is simple: needs spreadsheet software to open.
Converting your XLSX spreadsheet to CSV solves that. CSV is a plain-text table format where each line is a row and commas separate columns. Its simplicity makes it the universal exchange format for data between spreadsheets, databases and code. In practice you gain readable by virtually every tool and tiny, plain-text files. PrivConvert runs the whole XLSX-to-CSV conversion in server memory and deletes your file the instant the CSV is ready — nothing is stored, logged or reused.
When this conversion helps
- You need readable by virtually every tool
- You need tiny, plain-text files
- You need ideal for data import/export
- Sharing a XLSX spreadsheet with someone whose software expects CSV
Tips for best results
- After converting, open the CSV and skim the formatting — complex layouts occasionally need a small touch-up.
- Files up to 250 MB are supported, and you can batch-convert several XLSX files at once; each is processed privately and deleted immediately.
How to Convert XLSX to CSV Online
Here is how a XLSX → CSV conversion works on PrivConvert, from start to finish. What you gain with CSV: readable by virtually every tool.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from XLSX to CSV starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
Why convert XLSX to CSV with PrivConvert?
PrivConvert turns your XLSX into CSV without ever storing, logging or sharing it. Here is what that looks like in practice:
Your files are handled entirely by automated code. No staff, partner or AI model ever reads, stores or trains on your data.
Files are processed in volatile memory (RAM) and purged the instant your download is ready — nothing is ever written to disk, cached or backed up.
Every upload and download is protected with TLS 1.3, so your document cannot be intercepted on the way to the server or back to you.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
XLSX vs CSV - Format Comparison
| Feature | XLSX | CSV |
|---|---|---|
| File extension | .xlsx | .csv |
| Full name | Office Open XML Spreadsheet | Comma-Separated Values |
| Introduced | 2007 | — |
| Encoding | Binary | Text |
| Editable | Yes | Yes |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Why people pick PrivConvert for CSV
Thousands of people trust PrivConvert with their files because privacy here is structural — enforced by how the service runs, not just promised.